•Epicurus: Word forms are intrinsic, but are modified through use (i.e. through convention).
•Sextus Empiricus: Distinguished between the gender (masculine, feminine, and neuter) of nouns. Such classification was a remarkable insight for the time, however, it should be noted that distinguishing animacy markers by human gender is not the best way of looking at noun classification. In other words, the nouns that fall into the feminine gender don't necessarily have female characteristics (ex. the Greek word for battle helmet is feminine).
•Apollonius: made a "tentative development of the formal concept of syntactic government between transitive verbs and nouns" (Robins 1997:47).
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